Pervanadate
过钒酸盐
🗣️ 情景例句
Oh, let's go upstairs and prepare Grandpa's room.
对了，我们上去准备一下爷爷的房间。
What are you eating?
你正在吃什么？
Excuse me, what's that in English?
这个用英语该怎么说呢？